package book;

public class BookList {
    private Book[] books = new Book[10];//书架的大小
    private int usedSize;//数组中放了几本书

    //实例化book这本书
    public BookList(){
        books[0] = new Book("三国演义","罗贯中",90,"小说");
        books[1] = new Book("西游记","吴承恩",78,"小说");
        books[2] = new Book("红楼梦","曹雪芹",89,"小说");
        this.usedSize =3;
    }

    /**
     * 获取当前数组当中元素的个数
     * @return
     */
    public int getUsedSize() {
        return usedSize;
    }

    /**
     * 修改当前数组中元素的个数
     * @param usedSize
     */
    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }
    //可以在这里写所有对数组的操作 借书还书...

    /**
     * 获取pos下标的书
     * @param pos
     * @return
     */
    public Book getPos(int pos){
        return books[pos];
    }

    /**
     * 给数组的pos位置放一本书
     * @param pos
     * @param book
     */
    public void setBooks(int pos ,Book book){
        books[pos] = book;
    }

}
